By Divya
The Great Pyramid of Giza was built using over 2 million limestone blocks without modern tools. Its perfect alignment with the compass still amazes engineers today.
Around 3400 BCE, the Sumerians invented cuneiform, the first known writing system. They used clay tablets to record everything from trade to stories.
Mohenjo-Daro had straight streets, advanced drainage, and public baths. Their urban planning was so smart, it still inspires architects now.
Chinese alchemists discovered gunpowder while searching for immortality in the 9th century. It soon changed warfare across the world forever.
Roman concrete was super durable thanks to volcanic ash. Structures like the Pantheon, built in 126 AD, still stand strong after almost 2,000 years.